Table 1. Characteristics of the studied population.

	All patients		pN0 patients		pN+ patients
	N=265		N=126		N=139
Characteristics	n	%	n	%	n	%
Age (years)
<47	71	26.8	30	23.8	41	29.5
47–53	62	23.4	31	24.6	31	22.3
53–64	67	25.3	26	20.6	41	29.5
>64	65	24.5	39	31.0	26	18.7
Menopausal status
Pre	111	41.9	51	40.5	60	43.2
Post	154	58.1	75	59.5	79	56.8
Surgical tumour size
pT1	114	43.0	70	55.6	44	31.7
⩾pT2	139	52.5	52	41.3	87	62.6
ND	12	4.5	4	3.2	8	5.8
Histological type
Lobular	39	14.7	18	14.3	21	15.1
Ductal	216	81.5	99	78.6	117	84.2
Others	10	3.8	9	7.1	1	0.7
Lymph node status
0	126	47.5	126	100.0
1–3	83	31.3			83	59.7
>3	56	21.1			56	40.3
SBR grade in ductal carcinoma
1	31	14.4	17	17.2	14	12.0
2	114	52.8	58	58.6	56	47.9
3	57	26.4	22	22.2	35	29.9
ND	14	6.5	2	2.0	12	10.3
ER status
Positive	222	83.8	108	85.7	114	82.0
Negative	43	16.2	18	14.3	25	18.0
PgR status
Positive	208	78.5	106	84.1	102	73.4
Negative	57	21.5	20	15.9	37	26.6
Adjuvant systemic therapy
None	25	9.4	25	19.8	0
Hormone therapy	90	34.0	76	60.3	14	10.1
Chemotherapy	33	12.5	10	7.9	23	16.5
Hormone and chemotherapy	117	44.2	15	11.9	102	73.4